Fluke 35040 manual Reset/Measure, Setup B

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Appendix

Setup B

a timed measurement for sources that deliver at a constant exposure rate. If the predicted timed measurement is drastically different from the expected value, there is no reason to wait for the complete timer interval to expire before investigating the cause of the discrepancy.

NOTE

To differentiate the predicted and non-predicted timed measurements, the instrument alternates the display of time with a “PREDICT” indicator on the predicted timed measurement lines.

B.4 Operation Instructions

B.4.1 Front Panel Controls

Test Function

•When the Test Function screen is not displayed, pressing the TEST FUNCTION button displays the Test Function screen and the information/settings that were last viewed since power-up.

NOTE

The TEST FUNCTION screen provides access to information and settings such as the firmware revision, charge and current scale factors, battery and bias voltages, automatic leakage compensation settings, and timer settings.

•When the Test Function screen is displayed, pressing the TEST FUNCTION button displays a cursor that allows modification of the following settings:

-Enabling or disabling automatic leakage compensation or setting of the start and stop exposure current thresholds

-Selecting the timer interval, count mode, and decimal places

-Specifying the effective exposure time presentation

RESET/MEASURE

•When the Measurement screen is not displayed, pressing the RESET/MEASURE button displays the Measurement screen and the Measurement display that was last viewed since power-up.

•When the Measurement screen is displayed:

-And when the instrument is performing exposure measurements, pressing the RESET/MEASURE button toggles the timer

-Pressing and holding the RESET/MEASURE button for one second zeroes all exposure measurements; the instrument also zeroes leakage measurements if leakage was being measured

B-5

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Contents Therapy Dosimeter 35040Fluke Biomedical Table of Contents Troubleshooting and Service Addendum Features of Firmware Version 27JAN00 or LaterSample Customization Reports Iii Blank Features IntroductionIntroduction Before You Start Safety Precautions Safety Symbols And TermsOperators Manual Factory Calibration Error Source ± %rdg SpecificationsMaximum Error Manual AddendaFull Scale Range Display Resolution Full Scale Range Display Resolution Noise ± countsTimed Charge Measurements Current MeasurementsSpecifications Effective Exposure Time MeasurementsGeneral Measurements High Performance Power Supply and Battery Charger Unpacking and Inspection 35040 Functional Description Hardware Block Diagram of the Model 35040 Therapy DosimeterFront Panel Power SupplyMicroController Serial Communications PortElectrometer Basic Operating EquationsBias Supply Multiplexer and A/D ConverterQExposure Quantity Description Units CommentsQAccum QAccumpreviousCharge and Current Measurements Leakage Measurements= time of electrometer conversion s Timed Charge and Dose Exposure Charge and DosePredicted Timed Charge and Dose Setting ThresholdsAccumulated Charge and Dose Exposure Current and RateDoseRate = I a × Iccf Units/C × Adcf × RateMultiplier s Exposure TimeAir Density Correction Factor ⎝ PMm Hg = inch Hg x Units Display Minimum Maximum Standard Resolution ErrorSetup SetupFront Panel Familiarization IntroductionRear Panel Familiarization Powering The SystemIon Chamber Connector Power-Up Self-Test and Display MessagesBasic Measurement Techniques General ConsiderationsMaking Non-Timed Exposure Measurements Timer Setup Timer Use3Making Timed Exposure Measurements Using Other Ion Chambers Battery CareBattery Care PowerOperation Instructions Front Panel ControlsPowering Up the Model 35040 Therapy Dosimeter Powering Down the Model 35040 Therapy Dosimeter Using the Test Function ButtonOperation Instructions QScaleFactor=1.0000 IScaleFactor=1.0000 5Automatic Leakage Compensation 12. The Test Function Screen Showing the Timer SettingsCalibrated by Keithley RMD Nov 15 17. The Test Function Screen Showing the Timer Settings 6Timer SetupUsing the AIR Density Button Using the Detector Select ButtonUsing the Bias Select Button Using the Units Select ButtonSet 300.0 V 100% Central Electrde Pos IC Bias 300.0 V CEP Overranging Conditions Using the RESET/MEASURE ButtonReset Error Overrange ConditionsCondition Values Overranged Annunciators Reset Error With Automatic Leakage Compensation EnabledAnnunciators Annunciator ConditionIndicator Measurement Condition Measurement Indicators and Conditions? left of value Condition Overranged MeasurementCustomization Installing/Uninstalling Customization SoftwareConnection to the Computer Starting the Customization SoftwareDownloading Menu Items and ControlsCOM Port Drop Down List Ion Chambers Close or File CloseFile Save AS and File Print Edit Special Items OK and Cancel36. The Special Items Menu Calibration Temperature has focus Download and CancelMeasurement Displays Display Line Operators Manual Available Display LinesDisplay Line Group Selection Using the APPEND, DELETE, and Insert ButtonsSelecting an Item and Placing It Changing a Line on a Display38. The Timer Intervals Form Timer Intervals39. The Bias Settings Form Bias SettingsExamples Customizing a Measurement Display Changing the Pressure UnitsAppending a Display Deleting a DisplayErrors Troubleshooting Troubleshooting and ServiceSymptom ??Bias annunciator displayed Symptom Display does not light up when Power is pressedSymptom HiBias annunciator displayed Symptom LoBias annunciator displayedSymptom Configuration Error displayed Symptom Internal Reset Error displayedBit Description Action Do not makeSymptom Dashes displayed instead of digits Symptom Current Overrange DisplayedSymptom Bias voltage measurement changes by one digit Measurements. ReturnExample 299.9 to Display Will Not Light Hours? Is the battery voltage greater than 5.9 volts? Low BatteryBias Error Go toLine Model 35040 Therapy Dosimeter Fuse Replacement Line Fuse ReplacementInterface Connector Cleaning Cleaning The InstrumentReplaceable Parts Information Replaceable Parts List Warranty InformationRecalibration, Repair Information & Technical Assistance Replaceable Parts InformationBlank Sample Documents Sample Customization Reports35040 Appendix Sample Customization Reports 35040 Appendix Sample Customization Reports Blank Introduction New Features OverviewTimed Measurements Specifications Update New Features B SetupTimer Setup Procedure Timer Use ProcedureMaking Timed Exposure Measurements Setup B RESET/MEASUREAutomatic Leakage Compensation ADC ALCOperation Instructions B Start NA pA Stop Thres CurrentDecimal Places Timer SetupAnnunciators, Indicators, and Overrange Conditions Table B-2. Measurement Indicators and ConditionsTable B-1. Annunciators Condition Overranged Measurement1 Table B-3. Overrange ConditionsTheory of Operation Theory Of OperationConfiguration Error Service Required Error Number Main Menu Measurement MenuMeasurement Displays Figure B-9 shows the Measurement Displays dialog box Table B-4. Available Display Lines Figure B-10. The Timer Intervals dialog box Page Fluke Biomedical